Ametek PK II, Operating Instructions Manual, Page: 18 / 28

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5.3 CONNECTION
Connect a supply of clean, dry and oil-free air or nitrogen to the connection below the valve
marked
“ INLET ” .
CAUTION
The use of other gases will result in an incorrect reading.
Always use clean, dry and oil-free air or nitrogen.
When using the tester thru full range, regulate the supply pressure at 30 PSIG minimum,
however take care NOT TO REGULATE THE SUPPLY PRESSURE OVER 100 PSIG.
WARNING
Do not regulate the supply pressure over 100 PSIG.
Connect the instrument to be tested to the valve marked “ OUTLET ” . The tester ’ s input and
output connections are 1/4-inch male tube fittings.
The accuracy of the tester is seriously undermined by leaks in the output connections
and/or the instrument being calibrated. To check for leaks, load the tester so as to apply
a pressure indicating instrument and then turn off the tester output valve. If the pressure
indicated by the instrument being calibrated holds, it is safe to assume their are no leaks.
If, however, the pressure decreases, there is l kely a leak in the calibration system. You
must locate and fix the leak before calibration can take place.
Under no circumstances should mercury or corrosive fluids be permitted into the tester.
When the tester is used in connection with an instrument or pressure system that
contains a liquid, a suitable safeguard such as a trap or float-type manometer check
valve should be installed in the tester output line to prevent fouling of tester components.
Connect clean, dry and oil-free air or nitrogen to the INLET valve. Connect instrument to be tested to the OUTLET valve.
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